Arachnicides



- Patented Apr. 2,

ARACHNICIDES William P. ter Horst, Pompton Plains, N. 1., as-

sig'nor to United States Rubber Company; New York, N. Y., a corporation of New Jersey No Drawing.. Application .lune 28, 1944,

, Serial No; 542,611

6 Claims.

This invention'relates to improvements in arachnicides. 1 j

I have found that N-isopropylid'ene-p-ethoxy- .aniline is effective for control of arachnids. The term arachnid is used, in its broad sense to include spiders, mites, ticks, and the like. The structure of N-isopropylidene-p-ethoxy-aniline may be represented as follows:

The compound and method of preparation are described by Knoevenagel, Berichte der Deutschen Chemischen Gesellschaft, vols 54B, page 1730 (1921). It isthere called acetone-'p-phenetidil.

It has also been called N-isopropylidene-phenetidene.

The N-isopropylidene-p-ethoxy-ani1ine may be applied diluted 'or undiluted, mixed with carriers,v

with other arachnicides, or with fungicides, insecticides, insect repellents, fertilizers, plant hormones, bufiering or safening agents. Itmay be applied as a dust, alone or diluted with a suitable carrier, such as clay or talc, or in solution in a suitable organic solvent, or in suspension ina non-solvent, as .in an aqueous medium. The N- visopropylidene-p-ethoxy-aniline may be used to control Arachnida of the order which infest plants, such as red spider, brown mite; European red mite, citrus red mite, and also those which infest man, domestic animals, fowls, etc.

The following example illustrates the invention by the killing action of N- isopropylidene-pethoxy-aniline on Tetmnychus telar'ius, commonly knownas red spider. In these tests aqueous suspensions of .25 and .5% of N-isopropylidenep-ethoxy-aniline were prepared with .25 of Nacconal NE, a proprietary dispersing agent which is a 'sultonated'condensation product of chicrinated kerosene with benzene. Young bean plants, withiflrst true leaves iully expanded, were heavily with red spider, and then sprayed with the aqueous suspensions of N-isopropylidenep-ethoxy-aniline. Insect counts were taken after '12 hours. Control plants were sprayed with water containing .25% of Nacconal NR but no other added chemical. The results of the insect counts are shown in the following table and illustrate the great potency of N-isopropylidene-p-ethoxy-' .aqueous suspension of N-isopropylidene-p-eth aniline as an arachnicide.

Percent dead after- 72 hours Percent N-isopropylidene-p- "'"'v-amime v in aqueous suspension T e plants Control It may be seen from the above that N-is'oproylidene-p-ethoxy-aniline is an effective arachnicide. Having thus described my invention, what ,I claim and desire to protect by Letters Patent is: 1. An arachnicidal preparation comprising an oxy-aniline. 1

2. An, arachnicidal preparationcomprisingan i aqueous suspension of N-isopropylidene-p-ethoxy-aniline-containing a dispersing agent.

3. The method oi! proteotingtplants subject to 7 attack by arachnids which comprises applying N-isopropylidene-p-ethoxy-aniline to said plants.

4. Themethod of protecting plants subject to attackby arachnids whichcomprises spraying said plants withan aqueous suspension of N-isotected against arachnids.

6. The method of controlling arachnids which comprises treating the arachnids withN-isop'ropylidene-p-ethoxy-aniline.

Will-HAM P. was HORST. 

